一种动态共价交联双蛋白及其制备方法和应用

The lactoferrin-transferrin complex was constructed using dynamic covalent cross-linking technology, which solved the problem of insufficient stability of the lactoferrin and transferrin complex. It achieved improved stability and enhanced antioxidant function in weakly acidic to weakly alkaline environments, making it suitable for food, health products and drug delivery systems.

CN122080239BActive Publication Date: 2026-07-17HUAZHONG AGRI UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG AGRI UNIV
Filing Date
2026-04-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing combination of lactoferrin and transferrin is not stable enough and is easily affected by environmental factors. The protein activity may decrease and the bioavailability is limited, making it difficult to achieve stable synergistic enhancement of antibacterial and antioxidant effects.

Method used

Lactoferrin-transferrin complex was constructed using dynamic covalent cross-linking technology. Reduced glutathione was used to induce disulfide bond exchange between lactoferrin and transferrin, forming LF-SS-TF dynamic covalently cross-linked dual proteins. The chemical cross-linking method was adopted under mild conditions.

Benefits of technology

It significantly improves the stability of the protein in weakly acidic to weakly alkaline environments, and the encapsulation efficiency of red yeast rice liposomes is increased to 76.25%. It achieves deep complementarity between the structure and function of the protein, enhances its antioxidant and growth-promoting capabilities, and is suitable for food, health products and drug delivery systems.

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Abstract

本发明公开了一种动态共价交联双蛋白及其制备方法和应用,所述动态共价交联双蛋白为以乳铁蛋白和转铁蛋白为原料,以还原型谷胱甘肽为工具,使乳铁蛋白和转铁蛋白发生二硫键交换反应所构建的动态共价交联双蛋白。步骤如下:(1)将乳铁蛋白和转铁蛋白分别溶解于磷酸盐缓冲溶液中,获得乳铁蛋白溶液和转铁蛋白溶液;(2)将上述溶液混合,加入还原型谷胱甘肽,水浴振荡孵育;(3)加入EDTA终止反应;(4)透析去除游离还原型谷胱甘肽,即得。本发明的乳铁蛋白‑转铁蛋白复合物,实现了两种蛋白在抑菌、抗氧化功能上的协同增强,在弱酸性至弱碱性环境下的稳定性显著提升,红曲黄脂质体包封率从55.25%提升至76.25%。
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